The black kitten was just part of a litter from the cat next door. I don't know why she brought them over to our garage, but I gave them a treat and then she took them back over to their original home. They might have gotten scared because I saw a possum over there. Don't know if possums or opossums harm cats or kittens, but when I lived on a farm I saw where they killed chickens and ginny fowl.
I stepped outside this morning and saw a small kitten come out of our garage. It is just a few weeks or a month old. The color or marking is very similar to the turtle-shell kitten we had about a year ago.